Balance the following chemical equation (if necessary): KClO3(s)KCl(s)+O2(g) How many are required to produce ) according to the balanced chemical reaction: Hg(I)+HNO,(aq)Hg2(NO2)2(aq)+H2(g) STARTING AMOUNT Write a balanced chemical equation based on the following description: tin metal reacts with oxygen gas to produce solid tin(IV) oxide Sn(s)+O2(g) Balance the following chemical equation (if necessary): Ca(OH)2(s)+H3PO4(aq)H2O(I)+Ca3(PO4)2(aq)